In 2017, fluid and gas samples were collected across the Costa Rican Arc. He and Ne isotopes, C isotopes as well as total organic and inorganic carbon concentrations were measured.… Click to show full abstract
In 2017, fluid and gas samples were collected across the Costa Rican Arc. He and Ne isotopes, C isotopes as well as total organic and inorganic carbon concentrations were measured. The samples (n = 24) from 2017 are accompanied by (n = 17) samples collected in 2008, 2010 and 2012. He-isotopes ranged from arc-like (6.8 RA) to crustal (0.5 RA). Measured dissolved inorganic carbon (DIC) δ13CVPDB values varied from 3.55 to −21.57‰, with dissolved organic carbon (DOC) following the trends of DIC. Gas phase CO2 only occurs within ~20 km of the arc; δ13CVPDB values varied from −0.84 to −5.23‰. Onsite, pH, conductivity, temperature and dissolved oxygen (DO) were measured; pH ranged from 0.9–10.0, conductivity from 200–91,900 μS/cm, temperatures from 23–89 °C and DO from 2–84%. Data were used to develop a model which suggests that ~91 ± 4.0% of carbon released from the slab/mantle beneath the Costa Rican forearc is sequestered within the crust by calcite deposition with an additional 3.3 ± 1.3% incorporated into autotrophic biomass. Measurement(s)temperature of air • pH • Total Organic Carbon • carbon-13 atom • dissolved inorganic carbon content • dissolved organic carbon content • carbon dioxide • helium-3 atom • helium-4 atom • methaneTechnology Type(s)Temperature Probe Device • pH sensor • mass spectrometerFactor Type(s)time • location where data was collectedSample Characteristic - Environmentvolcanic arc • fumarole • hot spring • seepSample Characteristic - LocationCosta Rica Machine-accessible metadata file describing the reported data: https://doi.org/10.6084/m9.figshare.10293350
               
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